JPH079873A - Transmission operation device for travel gear - Google Patents

Abstract

PURPOSE:To freely operate a shift lever at the time of stopping power transmission. CONSTITUTION:A transmission operation device for a travel gear has a return spring 3 between a shift lever 32 having a brake lever 60 and frictionally holding a position for continuously variable transmission, and the interlock arm 34 of a transmission interlock mechanism 61 interlocked with the lever 32 for changing the speed of a continuous variable transmission belt, so that the arm 34 can be returned to a constant position relative to the shift lever 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used as a speed change operation device for a traveling transmission device such as a combine, a tractor, a seedling planting machine, a transport vehicle, etc.
Is capable of returning to the neutral position even when the continuously variable traveling transmission is stopped.

[0002]

2. Description of the Related Art In a continuously variable transmission using a continuously variable transmission belt having a split pulley, the gear is not changed unless the belt transmission is being performed. For this reason, if the rotation stops due to engine stoppage during transmission, the shift lever cannot be moved to change gears, and the shift lever cannot be moved either. In many cases, the gear shift operation mechanism can be bent to move it.

[0003]

This invention comprises a combination of a planetary transmission system A passing through a planetary gear mechanism 2 and a continuously variable transmission belt transmission system B passing through a continuously variable transmission belt 13. In a traveling transmission device that shifts the output rotation to neutral N, forward rotation F, and reverse rotation R by a continuously variable transmission operation of 13, a lever brake 60 is provided to frictionally maintain the continuously variable operation position. Lever 32 and this shift lever 32
A return spring 33 for returning the interlocking arm 34 to a fixed position with respect to these gearshift levers 32 is provided between the interlocking arm 34 of the gearshift interlocking mechanism 61 which interlocks with the gearshift interlocking mechanism 61 to shift the continuously variable transmission belt 13. The gear shift operation device is configured as follows.

[0004]

In the traveling transmission device, the transmission of the planetary transmission system A and the continuously variable transmission belt transmission system B is performed by the drive of the input shaft, and the output shaft side is shifted from the neutral N side to the forward rotation F side. It is possible to perform the sequential high-speed shift of the above and the sequential high-speed shift of the reverse R side. In this continuously variable transmission operation, when the continuously variable transmission belt 13 is shifted by the transmission lever 32 via the transmission interlocking mechanism 61, when the rotation by the continuously variable transmission is balanced with the constant rotation of the planetary gear mechanism 2, the output shaft rotates. Not neutral N
By setting the state as a boundary and shifting the transmission rotation by the continuously variable transmission to high or low, the output shaft side can be accelerated or decelerated in the forward rotation F region or can be accelerated or decelerated in the reverse rotation R region.

A shift lever for performing such a continuously variable shift operation
Since 32 can be pivotally operated against the lever break 60, even if the hand is released from the gear shift lever 32, the gear shift lever 32 is released.
The gear shift position of 32 does not change, and the continuously variable gear shift position can be maintained. When the gearshift lever 32 is rotated against the lever brake 60, the interlocking arm 34 of the gearshift interlocking mechanism 61 is pivoted via the return spring 33, and the continuously variable transmission belt transmission system B is continuously varied. To be done.

When the rotation of the continuously variable transmission belt 13 is stopped due to the stoppage of the continuously variable transmission belt transmission system B or the engine, the gear change interlocking mechanism 61 and the interlocking gears are operated.
The arm 34 is no longer rotated. Therefore, the shift lever 32
Is operated, the gear shift lever 32 is actuated by the action of the return spring 33.
Is allowed to rotate, and the rotation operation position is the lever break 60.
Maintained by

As described above, during the transmission by the continuously variable transmission belt transmission system B, the continuously variable transmission is performed in accordance with the shift operation of the shift lever 32. When the continuously variable transmission belt 13 is not rotated, The operation rotation of the shift lever 32 is caused by the return spring 3
It is possible to go against the return spring force of 3 and shift lever
The rotation of 32 can be absorbed by the return spring 33, and an unreasonable external force is not applied to the shift lever 32 and the shift interlocking mechanism 61.

Even when the continuously variable transmission belt 13 or the like is not transmitted, if the transmission lever 32 is operated to the target gear shift operation position in advance, the transmission of the continuously variable transmission belt 13 is performed to shift the gear. The operation position by -32 can be automatically performed. Further, when the shift lever 32 is suddenly operated, the interlocking arm 34 is rotated via the return spring 33, so that the operating force is buffered and the continuously variable shift belt 13 shifts smoothly. Do not overdo the transmission mechanism.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A traveling traveling case 2 of a combine has a split shape in the left-right axial direction, and supports an input shaft 1 and a speed change shaft 4 at an upper part, and an intermediate shaft 15, a steering clutch shaft 6, and left and right parts at a lower part. The traveling shaft 7 is supported. Of these, the pulley shaft portions 1B and 4B are provided at one end of the input shaft 1 and the speed change shaft 4, and the belt case 16 is provided so as to be openable and closable to provide the continuously variable speed belt 1
3 and the split-type speed change pulleys 11 and 12 for stretching the same are accommodated.

At the outer end of the input shaft 1, there is provided a pulley 17 for transmitting a belt 39 from the engine E side, a power take-off pulley 18 for transmitting a cutting device by a belt, and the like.
A drive gear 9 is provided in the device 9. In the belt case 16 of the input shaft 1, a pulley shaft portion 1B is detachably connected by spline fitting and has a split pulley 11.
Further, the transmission shaft 4 has a ring gear 10 which is rotated by meshing with the drive gear 9 in a gear case 19 portion.
The carrier 14 of the planetary gear 20 that meshes with the inside of the
The carrier 14 and the transmission gear 22 and the like which are integrally rotated via the shaft 21 of the planetary gear 20 are axially mounted, and the belt case 1
The 6th section has a pulley shaft section 4B which can be attached to and detached from the speed change shaft 4 by spline fitting, and a split pulley 12 is provided.

Splitting of these pulley shafts 1B and 4B
The pulleys 11 and 12 have a configuration in which the split pulley interval in each axial direction, that is, the pulley diameter can be changed, and the transmission by the belt 13 wound around these can be changed. Further, the speed change shaft 4 is changed by the continuously variable speed change belt 13, and the sun gear 3 rotates integrally, but the ring gear 10, the carrier 14, the speed change gear 22 and the like are rotatably provided. ing.

The transmission gear 22 is provided in the gear case 19 portion.
A rotatable ring gear 24 can be interlockedly rotated on the steering clutch shaft 6 via an intermediate gear 23 on the intermediate shaft 15 that meshes with the. The steering clutch 5 is provided on both left and right sides of the ring gear 24.
Is operated to be turned on and off by a shifter arm 25, and further, the left and right traveling shafts 7 are transmitted via a wheel gear 26 which meshes with a gear portion of the steering clutch 5.

For shifting the continuously variable transmission belt 12, a rod 29 is used to connect between arms 27 and 28 having cams 37 and 38 for moving the pulleys 11 and 12 in the axial direction. The arm 28 is interlocked with a bell crank shaft 31 that is rotatably supported by the transmission case 8 via a rod 30 having a universal joint, and is returned by rotating the shift lever 32 in the front-back direction. The configuration is such that a continuously variable shift operation can be performed via the spring 33, the interlocking arm 34, the rod 35, and the like. 6
Numerals 2, 63 are cam rollers which are rotatable at fixed positions for sliding the cams 37, 38.

Regarding the relationship with the shift lever 32 and the shift interlocking mechanism 61, a lever shaft 66 is fixedly or rotatably provided on a bracket 65 of a frame 64 of a control stand 47, and the lever shaft 66 is rotated around the lever shaft 66. The lever arm 67 is rotatably supported by a brake lining disc 68 so that the lever arm 67 can be frictionally braked.
It is tightened with 9. The shift lever 32 is the lever arm 6
At the upper end of 7, the swing shaft 7 in the direction orthogonal to the lever shaft 66
It is pivoted at 1.

A rotatable interlocking arm 34 is supported on the other end of the lever shaft 66, and a gearshift interlocking mechanism 61 is connected to one end of the interlocking arm 34. Further, a pin 72 is projected at the upper end of the interlocking arm 34 toward the lever arm 67 side and is positioned inside the pin 73 projecting from the lever arm 67 side. These pins 7 are provided at both ends of the return spring 33 fitted and supported around the shaft 66.
Hold pins 2 and 73 together so that both pins 72, 7
3 is configured to be capable of rotating and returning to the same phase.

As a result, the transmission lever 32 is braked by the brake 6.
When the rotary operation is performed against 0, the interlocking arm 34 integrated with the pin 72 is pivoted from the pin 73 via the return spring 33, and the shift interlocking mechanism 61 is interlocked. The drive transmission is performed by driving the input shaft 1 by means of the shift lever 32.
Ring gear 10 rotating at a constant speed while shifting gears 1 and 12
On the other hand, by changing the rotation speed of the sun gear 3, it is possible to shift from the neutral N to the normal rotation F high speed range, and conversely to the reverse rotation R range. When the steering gear 5 is turned on, the transmission gear 22 of the planetary gear mechanism 2 is moved from the traveling shaft 7 side in the engaged state of the steering clutch 5.
Since the carrier 14 and the carrier 14 are driven in reverse, the carrier 1
4, even if the planetary gear 20 revolves around the input shaft 1,
Since the sun gear 3 is meshed with the ring gear 10 that does not idle via the continuously variable transmission belt 13, the transmission shaft 4, etc., and the revolution is restricted, internal braking is performed and reverse drive is braked. It will be. Especially, the input process by the belt 39
When the input shaft 1 is not driven because the tension clutch pulley 40 to the pulley 17 is disengaged, the continuously variable transmission belt 1
Since 3 is not rotated, even if the sun gear 3 side is reversely driven from the carrier 14, the drive is not performed.

36 is a gear case 19 and a belt case 16
Is a partition wall for partitioning between the input shaft 1 and the speed change shaft 4. An example of a combine having such a traveling transmission device will be described. A sprocket 41 driven by the pair of left and right traveling shafts 7, an intermediate roller 42, and an end roller 43 bridge a crawler 44.
The transmission case 8 is provided in the front part of a chassis 45 having a pair of left and right crawlers 44, and is transmitted by a belt 39 and a tension clutch pulley 40 from an engine E mounted below the lateral control seat 46. sell. The shift lever 32 for shifting the continuously variable transmission belt 13 is provided on the control base 47 on the side of the cockpit 46, and is rotated in the front-rear direction to operate from the neutral position to the forward forward F position. It is possible to continuously change gears at a high speed in the forward direction, and to perform reverse speed change to a high speed in the backward direction as the rearward reverse R position is operated. Further, a power steering lever 48 is provided on the control console 47, and the steering clutch 5 and the shifter 25 of the steering brake 90 are operated by the left and right inclination of the power steering lever 48 to steer, and the forward and backward inclination is performed. The reaping device 49 is configured so that it can be moved up and down.

The mowing device 49 has a mowing frame 50, a mowing blade device 51, a grain culm raising device 52, a grain stalk scraping device 53, a conveying device 54 for conveying the slaughter grain culm, and the like.
A hydraulic shaft is provided between the chassis 45 and the mowing frame 50 by fitting a support shaft 55 at the rear end of the frame 50 into a mowing support metal 56 on the mission case 8 so as to be vertically rotatable. The cylinder is configured to control the raising and lowering of the reaping device 49.

A threshing device 58, which holds the grain culm transported by the transporting device 54 between a feed chain 57 and a sling and transfers it to the rear while threshing, is mounted on the rear part of the chassis 45. The transmission of the belt 39 from the engine E to the input pulley 17 is performed by the planetary gear mechanism 2 provided on the transmission shaft 4 which is the second shaft next to the input shaft 1. The diameter of the spring 17 can be reduced, and the mission case can be made compact so that the left and right crawlers 44 and the like can be brought closer to the inside.

The input shaft to the reaping device 49 is located at the support shaft 55, and a belt is provided between the pulley 59 fixed to the cockpit 46 side and the power take-off pulley 18 of the input shaft 1. Being transmitted. Since the pulleys 59 and 18, the input pulley 17 from the engine E, the bell crank shaft 31 for gear shift operation of the continuously variable transmission belt 13 and the like are provided on the side of the control stand 47, It is easy to open and close the belt case 16 portion of the mission case 8 from the outside.

By removing the belt case 16 from the gear case 19 side, the pulleys 11 and 12 and the continuously variable transmission belt 13 are removed.
Since the rod 30 connected to the bell crank shaft 31 and the connection between the arm 28 and the rod 29 are separated by pulling out the connecting pin 74, the plug 30 is exposed.
The re-shaft portions 1B and 4B can be taken out by removing the spline fitting between the input shaft 1 and the transmission shaft 4.

9 and 10, the difference from the above example is that the neutral N range of the shift lever 32 is widened. By rotating the shift lever 32, the cam 76 is moved by the pin 75. Rotate to move to the neutral N position
The braking force of the killing disc 68 and the spring 70 is weakened. As a result, the continuously variable transmission belt 13 and the transmission pulleys 11 and 12 try to escape to the neutral N position in which there is no load, so the vehicle searches for the neutral N position and stops traveling. Reference numeral 77 denotes a fixed cam fixed to the lever shaft 66, which can be moved in the direction of the lever shaft 66 according to the rotational phase of the cam 76, and changes the pressing force of the break 70 to a strong or weak force. In addition, the lever arm 67 and the interlocking arm 34
The relationship with the gear shift interlocking mechanism 61 and the like is the same as the configuration of FIGS.

In FIG. 11, the difference from the above example is that, in the operation groove 78 of the shift lever 32 in the control base 47, the work shift range S, which is a relatively low speed range from the neutral N position to the forward rotation F range, is moved forward and backward. In this configuration, the shift lever 32 is tilted laterally with respect to the direction to lengthen the operation stroke of the shift lever 32 so that fine adjustment operation can be easily performed. The forward rotation F side, which is on the front side of the work shift range S, is configured to perform a shift operation in a high speed range as a traveling range.

In FIG. 12, the point different from the above example is that the spring 70 is made of a shape memory alloy and the shift lever 32 is automatically positioned at the start of the engine E regardless of the position of the shift lever 32. 32 is returned to the neutral N position so that a smooth engine start can be performed. The spring 70 for tensioning the brake lining disc 68 has a property of loosening at normal temperature and stretching at low temperature. Pulleys 11, 1 of the continuously variable transmission belt 13 at the time of engine E start
When the belt 2 rotates, the belt lever 13 is automatically returned to the neutral N position by the force of returning the belt 13 to the neutral N position.
Return to position. If the temperature of the gear case 19 rises a little, the spring 70 receives the heat and tightens the break lining disc 68 to enable the normal shift lever 32 operation.
The spring 70 is in the form of a spiral spring instead of the upper disc spring.

In FIG. 13, the difference from the above example is that the clutch petal 79 and the gear shift lever shaft 66 for pressing the break lining disc 68 of the gear shift lever 32 are interlocked so that the clutch petal 79 is actuated at the engine start. When the running clutch is depressed by stepping on the wire, the wire 80 loosens, the friction braking force of the brake lining disc 68 loosens, and no load is applied between the continuously variable transmission belt 13 and the pulleys 11 and 12. With the acting force, the shift lever 32 returns to the neutral N position, and therefore, even if the main clutch is continuously connected, the sudden start of traveling is not performed. Reference numeral 81 is a spring for tensioning between the lever shaft 66 and the brake lining disc 68. The lever shaft 66 and the clutch pedal 79 are connected by a wire 80, and the clutch petal 79 is returned by a return spring 82. When the main clutch is depressed by depressing against, the wire 80 is loosened, the lever shaft 66 is returned by the spring 81, and the breaking force of the break lining disc 68 is loosened. On the contrary, if the clutch pedal 79 is released, the shift lever 32
The breaking power is strong.

In FIG. 14, the difference from the above example is that when the shift lever 32 is operated to the neutral N position, the belt is transferred from the power take-off pulley 18 to the input pulley 59 of the harvesting device input shaft 87. 83 Transmission tension clutch 8
Interlock with 4 to cut the transmission of the reaper. On the contrary, if the shift lever 32 is operated to the forward rotation F side, the tension clutch 84 is turned on and the reaper is interlocked, and the traveling transmission is carried out after the interlocking.

In order to widen the neutral N region of the shift lever 32, the lever arm 67 of the shift lever 32 and the interlocking arm 34 are engaged with each other by a long hole to maintain a loose range. Let In the free range of the neutral N position, the tension arm 85 of the tension clutch pulley 84 is pushed by the lever arm 67 and the arm 86 which rotates integrally with the lever arm 67 to interlock the tension clutch.

[Brief description of drawings]

FIG. 1 is a front view of a shift lever portion.

FIG. 2 is an exploded perspective view thereof.

FIG. 3 is a front view of the mission case.

FIG. 4 is a side view thereof.

FIG. 5 is a front view of a belt continuously variable transmission mechanism section.

FIG. 6 is a side view of the combine.

FIG. 7 is a plan view thereof.

FIG. 8 is a front view of a part thereof.

FIG. 9 is a front view showing another embodiment of the shift lever portion.

FIG. 10 is an exploded perspective view thereof.

FIG. 11 is a perspective view showing another embodiment of the operation lever portion.

FIG. 12 is an exploded perspective view showing another embodiment of the operation lever portion.

FIG. 13 is an exploded perspective view showing another embodiment of the operation lever portion.

FIG. 14 is a side view showing another embodiment of the operation lever unit.

[Explanation of symbols]

 2 Planetary gear mechanism 13 Continuously variable speed belt 32 Variable speed lever 34 Interlocking arm 60 Lever brake 61 Variable speed interlocking mechanism A Planetary transmission system B Continuously variable transmission belt transmission system N Neutral F Forward rotation R Reverse rotation

Claims (1)

[Claims] 1. A planetary transmission system A passing through a planetary gear mechanism 2,
It is configured to be combined with a continuously variable transmission belt transmission system B that passes through the continuously variable transmission belt 13, and the continuously variable transmission operation of the continuously variable transmission belt 13 changes the output rotation to neutral N, forward rotation F, and reverse rotation R. In the transmission, a shift lever-3 having a lever break 60 for frictionally maintaining the continuously variable shift operation position.
2 and the interlocking arm 3 of the gearshift interlocking mechanism 61 that interlocks with the gearshift lever 32 to shift the continuously variable transmission belt 13.
A gear shift operation device including a return spring 33 for returning the interlocking arm 34 to a fixed position with respect to the gear shift lever 32.